Preserve transform when de-parenting meshes

[LV3]

I've got a bunch of meshes, and I want to dynamically group them under some parent object and apply a transform (translate+rotate) to the parent to manipulate them as a group.

My problem is that the child meshes' world matrix isn't preserved when I swap from one parent to another, so I can't directly add/remove children from my dynamic groups like I want to.

I figure I can achieve my goal if I "de-parent" the child objects while preserving their world matrix.

Is there any way to do this built in to Babylon.js or do I have to hack out some matrix voodoo on my own? (I'm not exactly proficient with matrix computations)

[adam]

childMesh.setParent(null);

[LV3]

thanks. didn't know to use that method instead of setting childMesh.parent directly.